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[Letters to Editor]


P.S.—Since the foregoing letter was written,—which was sent to your office on the date it bears,—several contributions on the subject of my “note” have appeared in your journal. I will not now venture to intrude further upon your space, but, with your permission, shall reply to your other correspondents in a subsequent letter.


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B., W. [Letters to Editor]. Nature 1, 407 (1870).

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